Magazine hammer



April 30, 1946- K. F. MORBERG MAGAZINE HAMMER Filed Aug. 7, 1944 2 Sheets-$heet 1 HH I HI I I I HHI FIIIIQL INVENTOR. WFMOTZJGfQ,

A ril so, 1946. K. F. MORBERG 2,399,374

MAGAZ INE HAMMER Filed Aug. 7, 1944 2 Sheets-Sheet 2 IN VEN TOR.

Patented Apr. 30, 1946 MAGAZINE HAMMER Kenneth, F. Morbcrg Chicago, Ill assignor to Henry A, Torstenson, Chicago, Ill.

Application August '1, 1944, Serial No. 548,396

Claims.

This invention has to do with magazine hammers of the type disclosed in Krantz application Serial No. 383,249 filed March 14, 1941 The purpose of the p'resent'inv'ention is-to provide an improved magazinehammer of the type referred to which is quite economical to manufacture, will stand up without breakage under the most severe usage, is easy tokeep in repair, can be used in driving staples close up into corners and near other obstructions affording but little space for the head, and will drive the staples rapidly one after the other with but a minimum of effort.

While the foregoing statements are indicative in a general way of the nature of the invention, other more specific objects and advantages will be 'apparent to those skilled in the art upon a full understanding of the construction, arrangement and operation of the parts entering into the improved organization.

A preferred embodiment of theinvention is presented herein by way of exemplification, but it will of course be appreciated that the invention is susceptible of incorporation in other structurally modified forms coming equally within the scope of the appended claims.

In the accompanying drawings:

Fig. 1 is a side view of a hammer constructed in accordance with the invention;

Fig. 2 is a plan view of the hammer, with a portion of the removable cover for the handle broken away;

Fig. 3 is an end view of the head of the hammer;

Fig. 4 is a vertical longitudinal section through the head, showing the several parts of the staple driving mechanism in the positions which the same assume before driving a staple;-

Fig. 5 is a similar section, showingthe same parts in the ositions which they assume upon completing the driving operation;

Fig. 6 is a fragmentary horizontal section through the lower front portion of the head of the hammer, taken on the line 66 of Fig, 4;

Fig. 7 is a perspective view of the removable cap which forms the front and side walls of the vertical guideway through which the staple is driven into the work;

Fig. 8 is a perspective view of the bracket which "lines the inside of the head and forms the rear wall of the vertical guideway for the driving member; and

Fig. 9 is a vertical transverse section through thehandletaken on the line 1P9 or Fig. Y

The hammer shown in the drawings is characteriaed primarily by an upstanding head portibn II] which contains the staple driving mechanism andby an elongated handle portion II which contains the supply of staples and the spring actuated follower for advancing the same.

The main frame of the hammer consists of a long upwardly opening sheet metal channel member I2 which is provided with a bottom web I3 and with upstanding side flanges I4. The front portions I5 of the side flanges,are of suflicient height to house certain parts of the staple driving mechanism and are provided at their front ends with narrow vertically extending inturned flanges I B. The rear portions II of the side flanges I4 are enclosed within an upwardly opening composition channel member I8 which forms the hand grip.

The channel member I8 is secured to the channel member I2 by a plurality of screws I9. The screws I9 also serve to secureanother upwardly opening sheet metal channel member 20 in position within the channel member I2. The member 20 constitutes a staple holding bar on which the supply of staples 2| are placed and along which they slide in moving forwardly under the impetus of the usual spring actuated follower 22.

The sides 23 of the member 20 are spaced from the sides I] of the member I 2 to provide clearance for the legs of the staples. Small angle strips 24 are secured to the sides I1 above the sides 23 to keep the staples in position astraddle of the member 20. l

The otherwise open top of the handle portion I I is closed by a downwardly opening sheet metal channel member 25. The member 25 has side flanges 26 which rest upon the edges of the sides of the frame member I2 and fit with a certain amount of friction between the upwardly projecting portions of the sides of the hand grip member I8. The member 25 is provided at its front end with outwardly offset ears 21 which lap the sides I4 of the frame member I2 at a point just rearwardly of the head portion 1a and are pivotally connected with such sides by a cross pin 28. To obtain access to the staple holding bar within the handle portion II in order to replenish the supply of staples, it is merely necessary to swing the rear end of the member 25 upwardly into an out-of-the-way position.

The head portion II] is closed across'its top by a removable cover strip 29. The strip 29 is held in place at its rear end by notched side flanges 30 on the same which interlock with studs- 3! on the sides of the member I2, and is held in place at its froht end by apertured' sideflanges 32 on the same which receive screws 33 threaded into such sides.

The staple supporting member 28 is provided within the head portion In with a solid metal filler block 34 which completes the front end of the horizontal guideway for the staples. The block 34 terminates rearwardly of the inside front face of the head portion In the distance ofthe thickness of a single staple. An upwardly opening U-shaped sheet metal bracket 35 is welded or otherwise fixedly secured within the head portion ID with its side flanges 36 reenforcing the inner walls of the front portions l5 of the sides 14 of the frame member l2 and with its bottom 31 located just above the block 34' in horizontal alignment with the rearwardly disposed bottoms of the angle strips 24 in the handle portion H.

The bottom 31 of the bracket 35 is disposed with its front edge 38 in vertical alignment with the front face 39 of the filler block 34 and forms with the latter the rear wall of the vertical guideway through which the staples are driven. The front edges 39 of the sides of the bracket 35 are set back with respect to the front edge 38 of the bottom 31 and are arranged in a vertical plane to form the rear wall of the vertical guideway 40 in which the driving member 4| of the staple driving mechanism operates. The driver 4| is adapted to move up and down within the guideway 40 in a position directly above the forwardly projecting portion of the bottom 31 of the bracket 35. A compression spring 42 for the driver 4| is located within a downwardly opening recess 43 in the bottom of the latter and is centered at its lower end on an upwardly projecting stud 44 carried by the forwardly projecting portion of the bottom 31. v

The driver 4| is a solid metal block of rectangular form. It is recessed on its front face to receive a narrow downwardly projecting blade 45 flush with such face; The blade 45 is fixedly secured to the driver 4| by a headed rivet 46 which projects forwardly into the gap present between the inturned flanges l6. The blade 45 is of substantially the same thickness and width as one of the staples, and moves up and down with the driver 4| in a vertical guideway 41 located at the front edge 38 of the bottom 31 of the bracket 35. When the blade 45 moves downwardly in the guideway 41 it engages the top of the'foremost staple and drives the latter down through the lower part of such guideway into the underly work. The guideway 41 is formed in a shallow groove in the front part of a rearwardly opening U-shaped cap 4Bthe bottom of the groove defining the front wall 49 of the guideway and the sides of the groove defining the side walls 50 of the guideway.

The cap 48 is detachably fastened to the lower front portion of the head of the hammer by a pin 5| which extends through apertures 52 in the sides 53 of the cap and through other registering apertures 54 in the sides M of the member l2 and sides 36 of the bracket 35. The lower edge 55 of the cap is disposed substantially flush with the bottom |3 of the member l2, and the lower portions of the inturned flanges IE on the sides l4 of the member l2 are cut away at 56 to accommodate the front part of the cap 48 and provide a fixed vertical abutment for the latter.

A work striking member 51 of generally U- shaped form having a vertically disposed front portion 58 and rearwardly and upwardly extending side portions 59 loosely encompasses the cap 48 and is adapted to reciprocate vertically with by an arcuately movable pin 63.

respect to the latter. The lower edge 66 of the striker 51 normally projects a substantial distance below the lower edge 55 of the cap 48. When the striker 51 is brought down smartly against the work it moves in a generally vertical direction relative to the head of the hammer from the position shown in Fig. 4 to the position shown in 5. In Fig. 5 the hammer is illustrated as justha'ving driven a staple 6| into a piece of Work 62.

The striker 51 is guided in its vertical movement by the previously mentioned stationary pin 5| and The sides 59 of the striker are provided near their lower ends withvertically elongated slots 64 through which the ends of the pin 5| project, and are provided near their upper ends with circular apertures 65 within which the ends of the pin 63 fit. The pin 63 moves up and down in vertically elongated slots 66-of slightly arcuate form provided in the sides I4 of the member l2, and in registering slots 61 provided in the sides 36 of the bracket 35. The pin '63 is carried by the rear end 68 of a motion converting rocker member 69 located within thehead portion ID.

The rocker 69 is pivotally mounted intermediate its ends on a pin 10 which extends through aligned V openings 1|, 12 and 13 located respectively in the rocker 69, the sides M of the member I2 and the sides 36 of the member 35. The front end 14 of the rocker 69 is provided with a downwardly facing cam-shaped nose 15 which engages with-the upper flat surface 16 of the underlying driver 4| The pins 5|, 63 and 10 are all readily removable, and are held against inadvertent displacement by cotter pins 11 or other suitable means. The several parts of the staple driving mechanism can be quickly separated from the head portion ID of the hammer for cleaning or repair by mere- 1y withdrawing these pins and removing the cover 29. In the event of a jam the vertical guideway 41 through which the staples are driven into the work can be quickly cleared of a deformed staple by simply withdrawing the lower pin 5| and moving the cap 48 forwardly far enough to release the staple from the guideway.

The follower 22 which rides on the staple holding bar 20 behind the supply of staples 2| is urged forwardly by a long ribbon-like spring 18 which is connected at its rear end by a link 19 to a handle on the follower. The front end of the spring 18 is coiled under any desired degree of tension on a pin 8| located in the head portion III. The pin 8| has a squared portion for non-rotatable engagement within a squared aperture in one of the side walls of the head portion and is secured in any desired position of adjustment by an exteriorly accessible screw 82.

The hammer operates as follows: The staples 2| on the staple guiding bar 20 are urged forwardly along the bar by the spring actuated follower,22, causing the foremost staple to be projected into the vertical guideway 41 directly beneath the lower end of the blade 45 carried by the driver 4|. When the hammer is struck against a piece of work'the striker 51 comes and blade 45 downwardly, driving the foremost staple into the work. As soon as the hammer is raised from the work the driver 4|, with the blade 1.5,willretum toits elevated position again, oscillating the-rocker 69 a in the opposite direction and shifting "the sti i ker 5.! back into its normal position, in readiness foranother staple drivingopei siticn.

'lclaim:

'1; In a'=magazine hammer for driving staples or other fasteners, a head, a vertically movable upwardly spring pressed staple driver positioned in the head, a pivotall mounted-rocker havinga forwardly extending portion in engagement with the driver for moving the latter downwardly; :a vertically movable work striker h'aving aforward 1y extendi'rigportion for-contact with the work and upwardly and rearwardly disposed side portions connected rearwardly of the driver with a rearwardly extending portion of the rocker, and means for causing the striker to shift bodily relative to the head in a generally vertical direction when the forwardly extending portion of the striker is brought forcibly down into engagement with the work.

2. In a magazine hammer for driving staples or other fasteners, a head, a handle, an upwardly opening sheet metal channel member fixedly secured in the head and in the handle and extend ing longitudinally of the hammer from the front end of the head to the rear end of the handle, a second upwardly opening channel member nested within the first channel member and secured to the bottom of the latter with its sides in laterally spaced relation to the sides of the first channel member, and inwardly directed flange members on the sides of the first channel member in vertically spaced relation to the upper edges of the sides of the second channel member, the sides of the second channel member forming in conjunction with said inwardly directed flange members a longitudinally extending guideway in the handle of the hammer for supporting a supply of staples, and staple driving means located in the head at the front end of said guideway for receiving and driving the foremost staple.

3. In a magazine hammer for driving staples or other fasteners, an upwardly opening sheet metal channel member forming the head of the hammer, an upwardly opening U-shaped bracket positioned within the channel member, the front edges of the sides of the channel member being provided with inturned vertical flanges, and the front edges of the sides of the bracket being arranged rearwardly of the inturned flanges in spaced parallel relation to the same to provide therebetween a vertical guideway, and a staple driving mechanism for the hammer including a vertically reciprocable driver mounted in said guideway, said U-shaped bracket having a base portion extending partly beneath said driver, spring means connecting said driver and said extending base portion of said Ushaped bracket.

4. In a magazine hammer for driving staples or other fasteners, a head provided with a vertically extending guideway, a vertically movable staple driver positioned in the head for driving a staple downwardly through the guideway into a piece of work, a cap on the head which forms the front part of the guideway, a pin for releasably securing the cap in position, a vertically movable work striker which embraces the cap and slidably engages the ends of the pin, and motion converting means within the head in connection with the striker and the driver for moving the driver downwardly within the head to drive a staple upon the striker forcibly engaging with the work: and movin upw rdly wit respe t to theheadn 3 I p :5. ing, magazine hammer for driving staples or other fasteners, a head provided with a vertically extendin guidewaypa vertically movable staple igdriver positioned in. the head for driving az'stapl'e downwardly-1 through the guideway into a piece of work; a cap on thehead which forms the frontlpart of the guideway, av pin for releasahly. securingthe cap in position, a vertically mofvable workstriker which embraces the cap and slidably engages the ends of the pit -and motion converting means within the head in connection with the'striker and; the driver for mpving the driver'downwardlywithin the head to drive a staple upon the striker forcibly engaging with the work and moving upwardly with respect to the head, said pin upon being withdrawn permitting both the striker and the cap to be moved into an out-of-the-way position to afford access to the guideway.

6. In a magazine hammer for driving staples or other fasteners, a head, a vertically movable upwardly spring pressed staple driver positioned in the head, means having a forwardly extending portion in engagement with the driver for moving the latter downwardly, a vertically movable work striker having a forwardly extending portion for contact with the work and rearwardly disposed side portions connected rearwardly of the driver with a rearwardly extending portion of said first means, and means for causing the striker to shift bodily relative to the head in a generally vertical direction when the forwardly extending portion of the striker is brought forcibly down into engagement with the work.

7. In a magazine hammer for driving staples or other fasteners, a head, a vertically movable staple driver positioned in the head, resilient means urging said driver upwardly, pivotal means having a portion in engagement with the driver for moving the latter downwardly, a Vertically movable work striker having a forwardly extending portion for contact with the work, operating means connecting the work striker and said pivotal means to move the driver downwardly, said connections being located rearwardly cf the forward portion of the work striker.

8. In a magazine hammer for driving staples or other fasteners, a head provided with a vertically extending guideway, a vertically movable staple driver positioned in the head for driving a staple downwardly through the guideway into a piece of work, a cap on the head which forms the front part of the guideway, a vertically movable work striker which embraces the cap, means guiding the work striker in its vertical movement, motion converting mean connecting the striker and the driver for moving the driver downwardly within the head to drive a staple upon the striker forcibly engaging with the work and moving upwardly with respect to the head.

9. In a magazine hammer for driving staples or other fasteners, a head provided with a vertically extending guideway, a vertically movable staple driver positioned in the head for driving a staple downwardly through the guideway into a piece of work, a cap on the head which forms the front part of the guideway, a vertically movable work striker which embraces the cap, means guiding the work striker in its vertical movement, motion converting means connecting the striker and the driver for moving the driver downwardly within the head to drive a staple upon the striker forcibly engaging with the work 10. In a magazine hammer for driving staples or other fasteners, a head, a handle comprising an elongated U-shaped member, an upwardly opening sheet metal channel-member secured within the U-shaped handle member and extending from thefront end of the head to the rear end of the handle, a second upwardly opening channel member nested within the-first channel member and secured to the bottom of the latter with its sides in laterally spaced'relation' to the sides of the first channel member, and inwardly directed flange members on the sides of the first channel member in vertically spacedrelation to the upper edges of the sides of thesecond mem-v ber, the sides of the second channel member forming in conjunction with said inwardly directed flange members a longitudinally extendin guideway in the handle of the hammer for supporting a supply of staples, a cover member pivoted to said head'and having downwardly directed flanges adapted tofit nugly within the U-shaped handle member and in enga ement with the first mentioned channel member when inclosedposition. I i n KENNETH-F. MORBERG. 

